Yeah! You found it in your new book of DI pins. Cool.
It looks almost identical to a patch of a Polish Division, which was half red/white with a green cedar tree.
Steve
Enginears...Engeneres....Engineres----- I are one and I can't spell it.
Ya, that one paid off handsomely! 
Marion J Chard
Proud Daughter of Walter 'Monday' Poniedzialek
540th Combat Engineer - H&S Company
Larry:
My friend Richard Horrell, whom I earlier referred you to, just sent me this:
Dear Ms. Chard,
First of all, Happy Labor Day. I read that you had someone interested in the 341st? I have the unit history in front of me as I type. The shoulder patch, described as crosshairs in a scope, is that of IV Corps. Hopefully that will be of some assistance to the interested party.
Happy Labor Day,
Richard V. Horrell
WW 2 Connections
Marion J Chard
Proud Daughter of Walter 'Monday' Poniedzialek
540th Combat Engineer - H&S Company
Mr.Horrell,
Thank you so much for the information on the shoulder patch. This web site has been a wealth of information. I have learned so much thanks to all of you who are more than willing to help or to share.
Parker